We need to urgue the relevant department and management office to fix the problem.
However mosquito will still exist even we clear up our environment. We can suggest the management office to install the following device:
http://www.jnhdev.com/magnet00.htm
My mother's estate has installed this device. According to her the effect is very good. If your refer to the client list in the website many estates had already installed this device. This device is not cheap though. I hope that no one will object to use our management fund to solve our problem. I hope that the management office can take action soon to solve our problem....